Select “System Check” to see all problems. Often, these errors can be related to power supply problems. If you see a PF problem, you need to pay attention to it to eliminate temperature fluctuations. Check the fridge door. It may not be closed tightly enough. So, to fix the problem, you need to repair the door or replace the gasket. Warm air can enter the fridge through a worn gasket. if still the problem persists, you may need to replace the temperature sensor or control board.